Here's my plan with these free/5* summons:
First, be sure the FFX banner has started before doing the 5* one! If they give it to us Thursday and the FFX banner doesn't start until Friday, hold off until Tidus enters the pool. There's only a slight chance of getting him but worth it unless you really don't want him for some reason. By the same principle, there's little reason to wait until after the FFX banner unless you want a chance at (probably) Zargabarg (or whatever his name is) from the FFXII banner. (apparently this is a null point, as the banner starts right after maintenance)
Second, wait and see about the free 10+1. If the next banner after FFX is indeed FFXII, then it's worth waiting until that banner starts (assuming the 10+1 hasn't expired by then). The FFXII banner will add two golds to the pool (Ashe and Rasler) that are both worth it. Since everyone and their mom will be pulling for Rikku anyway, might as well wait and increase your chances of getting another worthwhile gold(s).
Not as excited about this new maze as I'd hoped, but as soon as I finish this machine killer TM later today I guess I'll run it for a few days until the madness starts.
It was kinda mentioned already, but the Kelsus summon doesn't mention anything about a limited number of summons, so if they are generous with the shards we could conceivably get enough to summon another Kelsus. Gonna be real annoyed if they give us 600-659 shards total to make us choose between summoning a second (for two TMs) or awakening our first.
Super disappointed with Gumi's announcements today. When was the last time they waited until Wednesday to announce a banner?